in the military art, is the putting of two ranks or files of soldiers into one. Thus, when the word of command is *double your ranks*, the second, fourth, and sixth ranks march into the first, third, and fifth, so that the six ranks are reduced to three, and the intervals between the ranks become double what they were before.

Doubling, among hunters, is when a hare keeps in plain fields, and winds about in order to deceive the hounds.

in the manege, is a term applied to a horse who is said to double his reins, when he leaps several times together, in order to throw his rider. Thus it is said, "the rambler doubles his reins, and makes pantlevis."

in Navigation, the art of sailing round or passing beyond a cape or promontory, so that the cape or point of land separates the ship from her former situation, or lies between her and any distant observer.